Please read the following paragraph and explain how the glyph outlines can be changed at any size.
Thanks.
A.Gill
Shape modification
TrueType affords the designer or engineer more flexibility and control over the final bitmap appearance than any other font format in use today. Through the use of the extensive range of commands in the TrueType instruction set, the designer is able to move any point on a glyph’s outline as little or as much as necessary to turn on or off any pixel on the bitmap grid. This provides as much control as a simple bitmap editor. Commands can be used not only to improve legibility of fonts at small sizes, but also to fundamentally alter the appearance of any bitmap at any size - enabling the production, for example, of a font where different sizes will produce a different shape.